Steam-pipe and boiler covering



(No Model.)

LA FAYETTE ALDRICH.

STEAM PIPE AND BOILER COVERING.

Patented Apr. 27, 1886.

ii l l .ing to be a full,

UNITED STATES PATENT OFFICE.

STEAM-PIPE AND BOILER cow-fame.

SPECIFICATION forming part of Letters Patent No. 340,691, dated April Application llled June 25,-1886.--Seriul No. 169,728. (No modem" To all whom 'it may concern:

Be it knownthat I, LA FAYETTE Acumen, a citizen of the United States, residing at Milwaukce, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Steam-Pipe and Boiler Coverings; and I do hereby declare the followclear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention, relates to improvements in steam-pipe and boiler-coverings; and it pertains to the devices for supporting the covering at a distance from the surface of the boiler or pipe, the peculiar arrangement of thc'several layers of the covering, and the manner .of forming the several separate non-circulating or dead-air spaces between the pipe or boiler and the exterior surface of the covering.

My improvements are explained by reference to the accompanying drawings, in which Figure 1 represents a longitudinal section of the covering surrounding the pipe. Fig. 2 is a cross-section through the pipeand covering, and Fig. 3 one of the supporting-studs.

Like parts are represented by the same reference-letters in all the views.

A is a steam-pipe. B isa sheet-metal plate, which is bent to conform to the exterior shape of the pipe or boiler which it surrounds, and the same is supported at a'slight distance from the pipe by the elongated heads of the studs or rivets O, which are secured in holes formed therein at suitable distances apart in said sheet metal B by riveting or upsetting them slightly, as shown, thereby forming an airspace, D, between the pipe and said first sheet-metal plate B. Upon the outer ends-of the rivets 0, between the sheet metal E and felt, one or more sheets of lining, preferably of asbestus paper d, is placed. Between the sheet E and the plate B a second air-space, F, is formed. Upon the asbe'stus paper d is placed next in order a thick packing of felt, G, which in turn is surrounded with thick paper H, and upon the paper H is an exterior cover, I, formed of tin, zinc, or other sheet metal, which cove'ringIis preferably provided with inward-projecting corrugations J, which rest upon the paper H and support the cover I at a slight distance from the paper, thus' forming a third air-space, K, between the pipe and exterior covering.

The inner section of the sheet-metal covering B is overlapped by the outer section at a. The ends of the sheets of felt are joined at b at the end of the outer section, B. The inner section of the outer sheet metal, I,- is ovcrlapped by the outer sheet at d on a line with the contiguous ends of the felt. By thus over- Y lapping and breaking the joints of the sheet metal and felt a more perfect and substantial joint is formed, which prevents the escape of the heated air from the several air-spaces.

The several sheets of metal, paper, and the felt packing are held together by the metallic bands .K and bolts L. a

When the coveringis all arranged and secured together, it is placed around or upon the pipe, or boiler, and thus securely fastcned by the bands K and bolts M, and as the nuts are turned down on said bolts M the exterior edges of the sheet-metal cover overlap each other until the contiguous edges of the felt and paper are brought into close contact, thus forming a. close] y-fitti ng joint at the junction of the sides of the covering, aswell as at its ends.

Having thus described my invention,what I claim as new, and desire to secure by Letters Patent, is I 8 1. In aboiler covering, the. combination, with the first sheet-metal wall surrounding the boiler orsteam-pipe, of the studs 0, having elongated heads extending inward toward and resting upon the surface of theboiler or pipe, and bodiesof less diameter extending through said sheet metal and riveted d'own against -its exterior surfaceysubst'antialiy 'as and for the purpose set forth. 2. In a covering for steam-pipes or boilers, the combination of the sheet-metal plate B,

supporting-studs 0, adapted to rest upon the boiler or pipe and support said plate B at a distance therefrom, sheet E, resting upon the outward ends of said studs, asbestus paper d, felt G, sheet H, and exterior cover, I, substantially as set forth.

3. The combiuationmith thstesi'n-pipe A, salidbaiids togethe'rand secure the covering in :o

of the covering consisting of the several sheets place around the pipe, as set forth.

of metal, paper, and felt, the supporting- In testimony whereof I aflix my signature in studs G, secured in the inner shegt-metal plate presence of two witnesses.

and supporting the same at a istance rom p the pipes or boilers, bolts L, securing the sev- LA FAYETTE ALDRICH eral parts of the covering together, bands K \Vitnesses:

K, secured to said covering by said bolts L, JAs; B. ERWIN,

and bolts Myas adapted to draw the ends of] G. '1. BENEDICT. 

